<!doctype html>
<meta charset=utf-8>
<link rel="author" href="mailto:chris@w3.org" title="Chris Lilley">
<style>
div {
  width: 100px;
  height: 100px;
}
div div {
  background-color: color(rec2020 0.23072 0.46956 0.08); /* rgb(-16.284% 54.0356% -5.7344%) */
  /* https://colorjs.io/apps/convert/?color=color(prophoto-rgb%200.23%200.43%200.13)&precision=6 */
}
</style>
<div>
  <div></div>
</div>